What are some alternative refrigerants with lower ODP and GWP values, and what are their advantages?

Alternative refrigerants like hydrofluoroolefins (HFOs), such as R-1234yf and R-1234ze, have negligible ODP values and significantly lower GWP values compared to traditional refrigerants. These alternatives offer improved environmental performance, similar or better thermodynamic properties, and compatibility with existing equipment designs. However, they may have higher costs and require additional safety precautions due to their flammability.